/Engine/Plugins/Experimental/Mutable/Source/CustomizableObjectEditor/Classes/MuCOE/Nodes/CustomizableObjectNodeObject.h
Return the LOD which a LOD pin references to. Retrun -1 if a pin does not belong to any LOD.
int32 GetLOD ( [UEdGraphPin](API\Runtime\Engine\EdGraph\UEdGraphPin) * Pin ) const